Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
3955043
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 271
TF target 264
Factored
FactorDigitsBitsDate
1213607697271288465513212476.72025-01-31 12:28:11
ECM
DigitsB1Curves
2550000192 / 280
Estimated T-Level: 23.4
TF below 2^73 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
FactoredRichard Workman3BFF355AF80416DC0Windows,Prime95,v14,(aka WQ1)
Factored1999-11-17Lynn Baier3BFF355AF80416DC1841695Windows,Prime95,v18,(aka WU1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
Certified Good
2025-01-31fordobrB90AE31F4D4C1F591104024553
History
DateUserTypeResult
2025-01-31Will KCERT
Proof certified good
2025-01-31fordobrC-PRPM3955043/121360769727128846551321 : B90AE31F4D4C1F59
Proof Certified Good

Proof Power: 7

2025-01-31fordobrF-ECMFactor: 121360769727128846551321 / ECM curve 30, B1=92900, B2=86472750, Edwards Sigma=7349968491665326
2025-01-24JossNF-PM1B1=10449570, B2=26215679490
2023-06-27Sid & AndyNF-PM1B1=5200000, B2=16199353170
2022-12-18JossNF-PM1B1=1000000, B2=481787460
2022-10-09JossNF-PM1B1=1000000, B2=113097600
2022-05-12JossNF-PM1B1=500000, B2=113097600
2021-06-02-anonymous-NFno factor TF: 70-71
2021-05-04axnNFno factor TF: 69-70
2020-10-05TJAOINFno factor TF: 68-69
2019-01-07YxinityNFno factor TF: 67-68
2017-07-20JossNF-PM1B1=380160, B2=3801600, E=6
2016-12-12Gordon SpenceNFno factor TF: 66-67
2016-05-05JossNF-PM1B1=190080, B2=3421440, E=6
2016-02-23Mark RoseNFno factor TF: 62-63
2016-02-23Mark RoseNFno factor TF: 1-60
2016-02-11ramgeisNFno factor TF: 65-66
2015-01-18VictordeHollanderNFno factor TF: 64-65
2015-01-18VictordeHollanderNFno factor TF: 63-64
2014-11-17JossNF-PM1B1=86228
2012-02-20GrunwalderGIMPNFno factor TF: 1-63
2011-09-22Squeeky_SquirrelNF-PM1B1=70000, B2=1190000, E=6
2011-03-28Grant McCrackenNFno factor TF: 61-62
2009-08-02Carsten KossendeyNF-PM1B1=20000, B2=285000
2009-01-15Architects CubedNFno factor TF: 60-61
1999-11-17-anonymous-C-LL3BFF355AF80416DC